Fondo "Giorgio e Gabriella Nebbia" - Sezione "Energia Solare"
23.67 G.Francia, A new collector of solar radiant energy Theory and experimental verification, (United Nations Conference on New Sources of Energy - Solar, Energy, Wind Power and Geothermal Energy, 3 may 1961); (in allegato: disegni tecnici). Collector with high characteristics for a solar motor, provided with a heat exchanger for direct measurement of the absorbed energy.